6510/65816 Addressing mode: Zeropage/Direct -- d
(ADC,AND,BIT,CMP,CPX,CPY,EOR,LAX,LDA,LDX,LDY,NOP,ORA,SAX,SBC,STA,STX,
STY,STZ)
(2 bytes) (3,4 and 5 cycles)
+---------------+------------------+-----------------------+----------+
| Cycle | Address Bus | Data Bus |Read/Write|
+---------------+------------------+-----------------------+----------+
| 1 | PBR,PC | Op Code | R |
| 2 | PBR,PC+1 | Direct Offset | R |
| (2) 2a | PBR,PC+2 | Internal Operation | R |
| 3 | 0,D+DO | Data Low | R/W |
| (1) 3a | 0,D+DO+1 | Data High | R/W |
+---------------+------------------+-----------------------+----------+
(1) Add 1 cycle for M=0 or X=0 (i.e. 16 bit data).
(2) Add 1 cycle for direct register low (DL) not equal 0.
See also: Abbreviations